%0 Journal Article %T 1H and 13C NMR Assignments of Cytotoxic 3S-1,2,3,4-Tetrahydro-¦Â-carboline-3-carboxylic Acid from the Leaves of Cichorium endivia %A Fu-Xin Wang %A An-Jun Deng %A Jin-Feng Wei %A Hai-Lin Qin %J Journal of Analytical Methods in Chemistry %D 2012 %I Hindawi Publishing Corporation %R 10.1155/2012/254391 %U http://dx.doi.org/10.1155/2012/254391